This is the last of the books between the Spriderwick Chronicles and the Beyond Spiderwick trilogy. It is a guide for Care and Showing of Sprites, endorsed by the International Sprite League. There is an illustration of each species and a symbol key for habitat, locomotion, disposition and additional traits.

The original website for the International Sprite League website appears to be abandoned so the Games, downloads and videos referenced at the back of the book are no longer available. But there is a website with some similar content. For fans of the Spiderwick books this one will give some more insight and adventure if you're the young and young at heart.